PID Tuning tells me the system has closed loop stability even though it doesn't

11 次查看（过去 30 天）
Manuel
Manuel 2015-4-21
回答： Arkadiy Turevskiy 2015-4-24
Hello everyone,
I am using the PID Tuning App to design a PID controler for my plant. It works pretty good, the systems reaction is pretty solid and the PID Tuning tells me that I have closed loop stability.
The problem is, when I check the root locus, it has some poles with positive real values, indicating my system is unstable. There is even a branch that is not reaching into the negative pane, so it would seem impossible to stabilize the system.
Also, if I design the controler with the "sisotool", I get the same result.
Is there something I might be missing?
Thank you in advance for any help!
Is it sometimes acceptable to work with a system even though it is not stable?

请先登录，再回答此问题。

回答（1 个）

Arkadiy Turevskiy
Arkadiy Turevskiy 2015-4-24
Could it be the same issue as in this question ?
If not, then please attach your models/files- hard to troubleshoot otherwise.

类别

在 Help Center 和 File Exchange 中查找有关 PID Controller Tuning 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by